Broadly speaking, affiliate marketing is a way to make money by being the middleman between sellers and buyers. You 1) create a blog or website, 2) promote products that you support and think are good, and 3) your readers go onto purchase those products. The seller then 4) gives you a cut of the profits.
This website will continue to review affiliate marketing opportunities, and weigh in on whether they’re scams or legitimate. For now, please check out my review of the Amazon.com Affiliates Program, and my post about Getting Started with creating and monetizing your own personal website or blog.